This cable should be used for DTE to DCE (for instance computer to modem) connections with hardware handshaking.
 (To Computer).
 (To Computer).
 (To Modem).
 (To Modem).
9 PIN D-SUB FEMALE to the Computer
25 PIN D-SUB MALE to the Modem
| Female | Male | Dir | |
|---|---|---|---|
| Shield | 1 |  | |
| Transmit Data | 3 | 2 |  | 
| Receive Data | 2 | 3 |  | 
| Request to Send | 7 | 4 |  | 
| Clear to Send | 8 | 5 |  | 
| Data Set Ready | 6 | 6 |  | 
| System Ground | 5 | 7 |  | 
| Carrier Detect | 1 | 8 |  | 
| Data Terminal Ready | 4 | 20 |  | 
| Ring Indicator | 9 | 22 |  | 
| Contributor: | Joakim Ögren, Søren Graversen | 
| Source: | ? | 
  Copyright © The Hardware Book Team 1996-2004.
  May be copied and redistributed, partially or in whole, as appropriate.
  Document last modified: 2002-01-10